15.0 mol H₂O
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to RightChemistry
Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:Step 1: Define
9.03 × 10²⁴ molecules H₂O
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 9.03 \cdot 10^{24} \ molecules \ H_2O(\frac{1 \ mol \ H_2O}{6.022 \cdot 10^{23} \ molecules \ H_2O})[/tex]Multiply/Divide: [tex]14.995 \ mol \ H_2O[/tex]Step 4: Check
Follow sig figs rules and round. We are given 3 sig figs.
14.995 mol H₂O ≈ 15.0 mol H₂O
What is the molality of a solution that has 6 mol of CaCl2 in 3 kg of water?
A. 2 m
B. 0.5 m
C. 6 m
D. 3 m
Answer:
2m
Explanation:
Hope this helps :)
Answer:
Answer is B.
Explanation:
3mol/6kg = 0.5m
According to the rate law for the reaction, an increase in the concentration of hydronium ion has what effect on this reaction?
Answer:
The rate of reaction increases.
Explanation:
higher concentration --> more collisions --> rate increases
10 pointsss Where are tsunamis likely to originate?
Answer:
Pacific Ocean
Explanation:
8.
Which of the following is NOT a desirable property for a material that is to be made ir
window?
A) hard
B) waterproof
C) opaque to light
D) rigid
Balance Nuclear Reaction
94239Pu --> 24He + ________
How many unpaired electrons are present in V3+?
Answer: two unpaired
Explanation: In general, electrons are removed from the valence-shell s-orbitals before they are removed from valence d-orbitals when transition metals are ionized. And thus, V3+ is paramagnetic, because it has two unpaired 3d-electrons.
If 3 moles of a compound use 12 J of energy in a reaction, what is the A
Hreaction in kJ/mol?
O A. 0.004 kJ/mol
O B. 4 kJ/mol
O C. -4 kJ/mol
O D. -0.004 kJ/mol
How much iron is present in 1.3400 grams of iron (III) oxide?
Answer:
69.94%
Explanation:
69.94% IRON IS PRESENT
Question: Based on this information, which type of light is more likely to damage the material?
1)The gamma ray light is more likely to damage the material because the gamma ray light can
pull energy out of the material when it passes through the material.
b
2)The X-ray light is more likely to damage the material because the X-ray light bounces off of
the material, which means that it has more energy.
3)There is no way to know because they are two different types of light, and different types of
light can change a material in different ways.
4)Neither type of light is likely to damage the material because the material does not take in
energy from either the X-ray light or the gamma ray light.
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lol
Answer: It will be D which is number 4........
Neither type of light is likely to damage the material, because the material does not take in energy from either the X-ray light or the gamma ray light.
Explanation:
What is the heliosheath?
Answer:
The heliosphere is the vast, bubble-like region of space that surrounds and is created by the Sun.
Need help on this please help
Answer:
The answer is: The Earth rotates on its axis.
Which describes the composition of carbohydrates?
Answer: Carbohydrates (carbo- = “carbon”; hydrate = “water”) contain the elements carbon, hydrogen, and oxygen, and only those elements with a few exceptions. The ratio of carbon to hydrogen to oxygen in carbohydrate molecules is 1:2:1.
HOPE THIS HELPS
CAN U GIVE ME BRAINLIEST
Use the drop-down menus to complete the statements.
A segment of DNA is called a
.
A complex of nucleic acids and proteins that make up chromosomes is called
.
A structure in the nucleus of an eukaryotic cell that is made up of condensed DNA is called a
.
A segment of DNA is called a gene.
A complex of nucleic acids and proteins that make up chromosomes is called Chromatin
A structure in the nucleus of an eukaryotic cell that is made up of condensed DNA is called a chromosome.
Answer:
1. Gene
2. Chromatin
3. chromosome
Explanation:
I hope this helps you :)
Which measurement shows the correct degree of precision for this ruler?
a. 1.5 cm
b. 1 cm
c. 1.55 cm
Answer:
1.5 cm
Explanation-
I took it ...
Calculate the percentage by mass in each element
N in NH3
Answer:
82.35%.
Explanation:
Mass of 1 molecule of ammonia
NH₃ = 14+3(1)
= 17
Calculating percentage by mass of N.
[tex]\%=\dfrac{\text{Mass of Nitrogen atom}}{\text{Mass of ammonia molecule}}\times 100[/tex]
[tex]\%=\dfrac{14}{17}\times 100\\\\=82.35\%[/tex]
So, the required percentage is 82.35%.
calculate the percentage by mass of oxygen in ammonium nitrate
Answer:
Percent composition of O is 48g80g×100%=60%
Plz help me with is thank you
Questions aren't clear, if u need assistance let me know .. I'm in year11 I can help out.
Figure S is reflected over the y-axis and then rotated 90° clockwise. Which side of Figure T' is
congruent to side 1 of Figure S?
KL
JK
MJ
LM
Answer: KL
Explanation:
The side of Figure T' that is congruent to side 1 of Figure S using relevant transformations is; KL.
How To Carry out Rotational Transformation?When rotating a shape 90° clockwise, it is expressed as;(x, y) → (y, -x).
When reflecting the image over the y-axis, it is expressed as (x, y) → (-x, y).
Carrying out the two transformations would mean that we are reflecting a shape over the y = -x line, where;
(x, y) → (-y, -x).
Thus, the side of Figure T' that is congruent to side 1 of Figure S is KL.
Read more about Rotational Transformation at; https://brainly.com/question/27224272
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What are quantum numbers?
Answer:
a number which occurs in the theoretical expression for the value of some quantized property of a subatomic particle, atom, or molecule and can only have certain integral or half-integral values.
Explanation:
In other words, it is a number that is Part of scientific theories or chemistry
Under which conditions will sugar most likely dissolve fastest in a cup of water?
A. A sugar cube with stirring at 5°C
B. A sugar cube without stirring at 15°C
C. Sugar crystals with stirring at 15°C
D. Sugar crystals without stirring at 5°C
Answer:
The correct answer would be C
Explanation:
Plz correct me if wrong
The condition in which sugar is most likely to dissolve fastest in a cup of water is when sugar crystals with stirring at 15°C. Therefore, option C is correct.
What conditions are required for dissolution?Dissolution is the process by which a solute dissolves in a solvent to form a homogeneous mixture called a solution. The conditions required for dissolution are:
Agitation: The solute and solvent must be mixed together so that they come into contact with each other.Temperature: Increasing the temperature of the solvent increases the kinetic energy of its molecules, making it easier for the solute to dissolve.Pressure: Increasing the pressure of a gas above a liquid solvent can force more gas molecules into the solvent, increasing its solubility.Surface area: The rate of dissolution is directly proportional to the surface area of the solute particles exposed to the solvent. Polarity: A solute will dissolve in a solvent that has similar polarity.Thus, option C is correct.
Learn more about dissolution, here:
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Does N2F2 obey the octet rule? Explain.
Oxygen Molecules taken in per breath: The Athletes result will be?
Answer:
Explanation:
the answer is higher because there is more exercise that makes it higher
hope this helps
Which element is a metalloid?
Si
Ne
Br2
Cl2
Answer:
There are 2 answers. A and C
Explanation:
Si is Silicon, which is a metalloid,
Br2 is Bromine, which is a metalloid
How can the structure of atoms be
connected to a colorful firework
display?
2. Using what you know of particle motion in solids, liquids, and gases, explain why you think temperature changes affect a substance's
state of matter. Use the terms particle motion, temperature, solid, liquid, and gas in your answer.
Explanation:
Temperature changes have significant impact on the physical states of matter and it drives most physical changes and even the chemical alteration occurring to substances.
When the temperature of substance increases, the particle's average kinetic energy increases. The average kinetic energy of the particles is the component heat resident within a body. As this energy increases, for solids, their particles in fixed lattices breaks free and begins move. Further increase in the temperature will cause a motion which leads to flowing of the particles on top of one another. This eventually culminates in bond breaking and hence gases forms. When heat is removed, the reverse process is what is ensues.Which choice names part of the lithosphere?
-inner core
-outer core
-all of the mantle
-crust and outer part of the mantle
pls i give a brainest
what chemical reaction type is Pb + 2 H3PO4 --> 3 H2 + Pb3(PO4)2
Answer:
single displacement reaction
Explanation:
it is because an atom(Pb) dispalces another atom(H) in H3PI4
The given chemical reaction is single displacement reaction.
What is single displacement reaction?When one element in a molecule gets replaced by another, is therefore called a single displacement reaction.
The given reaction is Pb + 2 H3PO4 → 3 H2 + Pb3(PO4)2
It can be seen that when lead is treated with H3PO4 then it will give Pb3(PO4)2 and hydrogen reaction. It is a kind of single displacement reaction.
Therefore, the given reaction is single displacement reaction.
To know more about single displacement reaction.
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2 Students were asked to identify the location of elements in the periodic table based on clues
printed on game cards.
Element 1
• Shiny black solid
• Metalloid
• 3 valence electrons
• 2 energy levels
Element III
• Colorless gas
• Nonmetal
• 8 valence electrons
• 5 energy levels
Element II
• Steel-gray solid
• Brittle metalloid
• 5 valence electrons
• 4 energy levels
Element IV
• Silvery-white solid
• Soft metal
• 2 valence electrons
• 6 energy levels
Based on the data, which periodic table shows the correct location of the four elements?
Answer:
B
Explanation:
I took the test
Element 1 is silicon. An element's atoms all contain the same amount of protons, but its electron and neutron counts might vary.
What is element?A material that cannot be destroyed chemically is referred to as a chemical element. Although chemical processes cannot modify an atom, nuclear reactions can create new elements.
The quantity of protons an element has defines it. An element's atoms all contain the same amount of protons, but its electron and neutron counts might vary. Ions are produced by altering the electron to proton ratio, whereas isotopes are produced by altering the neutron count.
118 known elements are present. A study is being done to create element 120.1. The periodic table will have to be modified to include element 120 after it has been created and validated. Element 1 is silicon.
Therefore, the element 1 is silicon.
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what is the answer pls help me
Answer:fist one 2 and 3 next
Explanation:
i looked it up
How many grams of aluminum oxide are produced according to the reaction below given that you start with 13.2 grams of Al and 13.2 grams of O2?
Reaction: 4AI + 3 02 → 2A1203
Answer: 24.87g Al2O3
Explanation: Aluminum is our limiting reagent
[tex]13.2g Al * \frac{1 mol Al}{26.98 g} * \frac{2 mol Al2O3}{4 mol Al} = 0.244 mol Al2O3[/tex]
First of all we need to convert the grams of aluminium to moles, then use the molar fraction of the balanced equation (4 moles of aluminium equals 2 of aluminum oxide).
If we made the same procedure with the oxigen we get a 0.273 mol of Al2O3, therefore the O2 is the excess reagent.
The last step is convert the moles of the limiting reagent to grams
[tex]0.244 mol Al_{2} O_{3} * \frac{101.96g}{1mol Al2O3} = 24.87g Al2O3[/tex]
And that´s it!
